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Growth of 4-N,N-Dimethylamino-4'-N'-methyl-stilbazolium Tosylate (DAST) Organic Single Crystals Controlled by Oleic Acid

1
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China
2
School of Engineering, Brown University, Providence, RI 02912, USA
3
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
4
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610014, China
*
Author to whom correspondence should be addressed.
Crystals 2019, 9(10), 494; https://doi.org/10.3390/cryst9100494
Received: 15 August 2019 / Revised: 18 September 2019 / Accepted: 21 September 2019 / Published: 25 September 2019
4-N,N-Dimethylamino-4'-N'-methyl-stilbazolium Tosylate (DAST) organic single crystals controlled by (Z)-Octadec-9-enoic acid (oleic acid, OA) was grown by a slow-cooling method. The as-grown DAST single crystals were systematically characterized by FTIR, X-ray diffraction, second harmonic generation, and UV-vis spectroscopy. Results indicate that addition of OA into the DAST solutions leads to the controlled growth of DAST single crystals and consequently, the crystal quality and optical properties can be modified. Particularly, the DAST crystals grown under the control of OA exhibit larger sizes, higher crystallinities, and better optical qualities with higher optical band gaps and lower defect density, compared with those grown in the absence of OA. These results are helpful for better understanding the controlled growth of DAST organic single crystals and modifying their properties for practical applications. View Full-Text
Keywords: nonlinear optical materials; DAST single crystals; crystal growth; additives nonlinear optical materials; DAST single crystals; crystal growth; additives
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MDPI and ACS Style

Wen, X.; Xu, X.; Zhou, H.; Hu, L.; Jing, Y.; Xu, J.; Cheng, X.; Shi, J.; Liu, X.; Fan, T.; Zhang, M.; Gu, Y. Growth of 4-N,N-Dimethylamino-4'-N'-methyl-stilbazolium Tosylate (DAST) Organic Single Crystals Controlled by Oleic Acid. Crystals 2019, 9, 494.

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